CN106282863B - The food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength - Google Patents
The food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength Download PDFInfo
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- CN106282863B CN106282863B CN201610812118.3A CN201610812118A CN106282863B CN 106282863 B CN106282863 B CN 106282863B CN 201610812118 A CN201610812118 A CN 201610812118A CN 106282863 B CN106282863 B CN 106282863B
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- temperature
- aluminium foil
- negative pressure
- high temperature
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
Abstract
The invention belongs to non-ferrous metal to roll technical field, is related to the production technology of aluminium foil, the more particularly to food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength.Include the following steps：Aluminum foil coil room temperature stands 70~80h after rolling bundling, is placed in annealing furnace, and 190 ± 2 DEG C of setting medium temperature temperature, heating rate is no more than 5 DEG C/h；After medium temperature temperature set by arrival, insulation；After insulation, the heating of quick total power or controlled it is rapidly heated；Up to after 210 ± 2 DEG C of high temperature, 50~80h is kept the temperature；80 DEG C are cooled to, insulation, can come out of the stove after aluminium volume internal and external temperature is consistent.Using 190 DEG C of medium temperature formerly, 210 DEG C of high temperature can shorten annealing time, save the energy in rear staged thermal annealing process the present invention.Through medium temperature, high temperature staged combination negative pressure anneal, reach the compound milk pack aluminium foil of lamination and 70 ~ 80N/mm is reached to compound rear peel strength requirement, the food packaging aluminium foil of obtained high-peeling strength, inside and outside tensile strength2, lamination composite effect is optimal.
Description
Technical field
The invention belongs to non-ferrous metal to roll technical field, is related to the production technology of aluminium foil, more particularly to high-peeling strength
Food packaging aluminium foil high temperature negative pressure anneal technique.
Background technology
Aluminium foil is that metallic aluminium is directly rolled flakiness, its thickness is less than or equal to the strip aluminium of 0.2mm.Various countries are to aluminium
The regulation of paper tinsel thickness is not consistent, and China, France, the upper limit of Russia are 0.2mm；The U.S., the upper limit of Britain and Japan are
0.15mm；The upper limit of Germany is 0.02mm.In China, usually thickness is less than the aluminium foil for there are two zero after 0.01mm, that is, decimal point
(such as 0.0055~0.009mm), is known as double-zero aluminum foil, is then known as thin foil (light gauge foil) in the world；And thickness
The paper tinsel of 0.01mm~0.1mm is known as single zero aluminium foil, is known as thick paper tinsel (heavy gauge foil) in the world, also there is referred to as middle thick paper tinsel
(medium gauge foil's)；Paper tinsel of the thickness not less than 0.1mm is known as thick paper tinsel.
Aluminium foil products are generally divided into cigarette aluminium foil by its final use, aluminum foil for flexible package (can be applied to the bag such as food, medicine
Dress), aluminium foil used in capacitor etc., all kinds of aluminium foils have not aluminium foil production process and technological parameter according to its final usage
Same requirement.From the technical point of view, aluminium foil used in capacitor thickness has reached 0.0045mm at present.Used in production flexible package
During 0.006~0.0065mm thickness aluminium foils, technical difficulty is not big, but the such high-quality of extensive, profitable production
Aluminium foil is but not easy to.With food flexible packing health, security requirement increasingly reinforcing, to compound used adhesive
The use limitation of the middle various additives for improving fitting intensity increases, and compound rear peel strength index request is more and more tighter,
During applied to packaging for foodstuff industry, it is desirable to which aluminium foil has higher attribute easy to attach in itself.Particularly using milk pack as representative
Lamination complex class flexible package punch, packaging producer uses the stickiness of peel strength Indexs measure aluminium foil after compound.
Technological difficulties are：After this kind of aluminium foil is compound to plate shape, surface cleanliness, finished product, particularly lamination it is compound after
Peel strength has high requirement.Extensive, effective beneficially to produce this kind of high-quality aluminium foil, reducing production cost just becomes enterprise
What industry dominated the market pursues a goal.
The content of the invention
For above-mentioned the deficiencies in the prior art, the present invention provides a kind of food packaging aluminium foil of high-peeling strength
High temperature negative pressure anneal technique.
The food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength, includes the following steps：
Step A, aluminum foil coil room temperature stands 70~80h after rolling bundling, and preferably 72h, is subsequently placed in annealing furnace, according to
According to environment temperature and target annealing temperature, 190 ± 2 DEG C of setting medium temperature temperature, preferably 190 DEG C, heating rate is no more than 5 DEG C/h；
Step B, after medium temperature temperature set by reaching, 50~55h is kept the temperature；
Step C, after keeping the temperature, the heating of quick total power or it is controlled be rapidly heated, heating rate is no more than 5 DEG C/h；
Step D, after reaching 210 ± 2 DEG C of high temperature in stove, preferred 210 DEG C of high temperature keeps the temperature 50~80h, preferably 60h；
Step E, 80 DEG C are cooled to, insulation, can come out of the stove after aluminium volume internal and external temperature is consistent；
Wherein, from starting to warm up to insulation ending phase, negative pressure 100-150mm water columns, negative-pressure air fan are kept in annealing furnace
3h, purges wind turbine 1h alternate runs.
Other air-cooler fast cooling can be used by cooling down in preferred embodiment of the present invention, in step E.
In preferred embodiment of the present invention, after the calendering bundling, aluminum foil coil width 1000mm~1500mm, coil diameter
600~800mm, preferably 70~80h of time of repose, 72h, discharge distortional stress.
Described to rise to middle thermophase in preferred embodiment of the present invention, heating rate is no more than 5 DEG C/h, ensures inside and outside aluminium volume
Temperature Synchronous lifting, avoids aluminium volume internal because of the uneven gauffer produced of expanded by heating, Blister.
First using 190 DEG C of medium temperature in preferred embodiment of the present invention, 210 DEG C of high temperature heats up in rear staged, is the present invention
Distinguished with the maximum of existing annealing process, it is advantageous that：A. thermal energy in stove is made full use of；B. oil removing effect inside and outside aluminium volume is improved
Rate, reaches A+；C. tensile strength reaches 70~80N/mm inside and outside aluminium volume2, lamination composite effect is optimal.Existing 180~200 DEG C
Low temperature long-time, ladder cooling annealing process, from high to low, temperature transition thermal loss is big for temperature, swabbing inspection expansion after annealing
Dissipate property to decline, do not reach overall A+ requirements.
In preferred embodiment of the present invention, terminate to use negative pressure 100-150mm water columns, negative pressure wind up to keeping the temperature from starting to warm up
Machine 3h, purges wind turbine 1h alternate runs；Without using whole negative pressure in current technology, energy-saving effect is identical but constant negative pressure makes in stove
No fresh air supplement causes oil gas to remain, and is unfavorable for improving deoiling effect；3：1 it is time-interleaved improve purging effect, effectively
Remove oil gas residual in stove.
Annealing process used in the present invention, the optimization of its temperature and time are determined according to factory's finish rolling ROLLING OIL full range detection
Data are worked out, and the evaluation of entire volume deoiling effect, which uses, after annealing breaks volume inspection technique, does not roll up 3~5mm side of surface using routine inspection aluminium
Method.
Through annealing process disclosed in this invention, the food packaging aluminium foil of obtained high-peeling strength, inside and outside tension is strong
Degree reaches 70~80N/mm2, lamination composite effect is optimal.
Beneficial effect
Using 190 DEG C of medium temperature formerly, 210 DEG C of high temperature is in rear staged thermal annealing process, using negative pressure with blowing by the present invention
Wash 1：3 time controls reach shortening annealing time, save the purpose of the energy.Conventional cryogenic long term annealing technological temperature by height to
Low, temperature transition thermal loss is big, and swabbing inspection diffusivity declines after annealing, does not reach overall A+ requirements；Conventional vacuum cavitations
Using whole negative pressure, energy-saving effect is identical but constant negative pressure makes to cause oil gas to remain without fresh air supplement in stove, is unfavorable for carrying
High deoiling effect.Medium temperature, the combination of high temperature staged, reaching the compound milk pack aluminium foil of lamination will to compound rear peel strength
Ask, meanwhile, use negative pressure and purging 1：3 time controls reach shortening annealing time, save the purpose of the energy.
Brief description of the drawings
Fig. 1 is conventional annealing process curve figure, wherein, transverse axis is the time (h), and the longitudinal axis is temperature (DEG C).
Embodiment
With reference to embodiment, the present invention is described in detail, so that those skilled in the art more fully understand this hair
It is bright, but the invention is not limited in following embodiments.
Annealing technology：
1. room temperature is needed to stand 70~80h, the distortional stress that release aluminum metal calendering produces after product cutting；
2. the temperature rise period uses controlled warming, according to power house environment temperature and target annealing temperature, heating rate is set not
More than 5 DEG C/h；
3. enter insulation after reaching 190 ± 2 DEG C of medium temperature set point；
After 4. medium temperature is kept the temperature, using the heating of quick total power or controlled it is rapidly heated；
5. reach a high temperature after 210 ± 2 DEG C, into insulation；
6. from starting to warm up up to insulation terminates to use negative pressure 100-150mm water columns, negative-pressure air fan 3h, purging wind turbine 1h is handed over
For operation；
7. cooling uses other air-cooler fast cooling；
8. being cooled to 80 DEG C of insulations, make to come out of the stove after aluminium volume internal and external temperature is consistent.
1 annealing process list of table
It is of the invention compared with existing 180~200 DEG C of low temperature long term annealing technique, using medium temperature, high temperature staged
Combination, reaches the compound milk pack aluminium foil of lamination to compound rear peel strength requirement, meanwhile, use negative pressure and purging 1：When 3
Between control reach shortening annealing time, save the purpose of the energy.
2 conventional annealing technique list 1 of table
3 conventional annealing technique list 2 of table
Table 2, table 3 check deoiling effect A after annealing, but each 200mm width peel strength in the compound rear both sides of lamination is less than 1N.
Embodiment 1
0.0063 × 1134mm coil diameter 600mm annealing process lists
Specification：0.0063 × 1134mm,
Standing time after bundling：72h,
Coil diameter：500~650mm,
Heating：33~36h is warming up to 190 DEG C, keeps the temperature 50h,
High temperature：2h is warming up to 210 DEG C of insulation 50h,
Cooling：80 DEG C of insulation 15h are cooled to,
Detection：Oil removing：A+, tensile strength：73N/mm2。
Peel strength after compound：＞ 1.8N.
Embodiment 2
0.0063mm finished product 1290mm coil diameter 800mm annealing process lists
Specification：0.0063 × 1290mm,
Standing time after bundling：72h,
Coil diameter：750~800mm,
Heating：33~50h is warming up to 190 DEG C, keeps the temperature 50h,
High temperature：4h is warming up to 210 DEG C of insulation 60h,
Cooling：80 DEG C of insulation 15h are cooled to,
Detection：Oil removing：A+, tensile strength：76N/mm2。
Peel strength after compound：＞ 1.8N (actual measurement is shelled not open).
The foregoing is merely the embodiment of the present invention, is not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification is made, is directly or indirectly used in other related technical areas,
Similarly it is included within the scope of the present invention.
Claims (6)
1. the food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength, it is characterised in that include the following steps：
Step A, aluminum foil coil room temperature stands 70~80h after rolling bundling, is subsequently placed in annealing furnace, according to environment temperature and
Target annealing temperature, 190 ± 2 DEG C of setting medium temperature temperature, heating rate is no more than 5 DEG C/h；
Step B, after medium temperature temperature set by reaching, 50~55h is kept the temperature；
Step C, after keeping the temperature, quick total power heating, heating rate is no more than 5 DEG C/h；
Step D, after reaching 210 ± 2 DEG C of high temperature in stove, 50~80h is kept the temperature；
Step E, 80 DEG C are cooled to, insulation, can come out of the stove after aluminium volume internal and external temperature is consistent；
Wherein, from starting to warm up to stove in reach 210 ± 2 DEG C of high temperature after, keep the temperature 50~80h, negative pressure 100- kept in annealing furnace
150mm water columns, negative-pressure air fan 3h, purges wind turbine 1h alternate runs.
2. the food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength according to claim 1, it is characterised in that：Step
In rapid A, aluminum foil coil room temperature stands 72h after the calendering bundling.
3. the food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength according to claim 1, it is characterised in that：Step
In rapid A, the medium temperature temperature sets 190 DEG C, 5 DEG C/h of heating rate.
4. the food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength according to claim 1, it is characterised in that：Step
In rapid C, the heating is rapidly heated using controlled, 5 DEG C/h of heating rate.
5. the food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength according to claim 1, it is characterised in that：Step
In rapid D, 210 DEG C of high temperature is reached in the stove, keeps the temperature 60h.
6. the food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength according to claim 1, it is characterised in that：Step
In rapid E, the cooling uses other air-cooler fast cooling.
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| CN201610812118.3A CN106282863B (en) | 2016-09-08 | 2016-09-08 | The food packaging aluminium foil high temperature negative pressure anneal technique of high-peeling strength |
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| CN106282863B true CN106282863B (en) | 2018-04-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059033A (en) * | 2017-03-27 | 2017-08-18 | 江苏大亚铝业有限公司 | A kind of oil removing process for improving medicinal aluminum foil moistened surface tension force |
| CN109811283A (en) * | 2019-03-27 | 2019-05-28 | 江苏大亚铝业有限公司 | The annealing process of double-zero aluminum foil prevention surface hot drum |
| CN110760767B (en) * | 2019-10-31 | 2020-08-14 | 重庆中铝华西铝业有限公司 | Annealing and oil removing method for large-width double-sided polished aluminum foil |
| CN113215504A (en) * | 2020-01-21 | 2021-08-06 | 江苏大亚铝业有限公司 | Oil removing process for improving wetting tension of surface of medicinal aluminum foil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04231442A (en) * | 1990-12-27 | 1992-08-20 | Furukawa Alum Co Ltd | Production of aluminum foil for middle-and high-voltage electrolytic condenser anode |
| CN1111681A (en) * | 1995-03-30 | 1995-11-15 | 云南铝加工厂 | Technology of sectional type negative pressure anneal oil removing for aluminium material |
| JPH0920970A (en) * | 1995-06-30 | 1997-01-21 | Kobe Steel Ltd | Method for annealing aluminum foil for electrode of electrolytic capacitor |
| CN102560294A (en) * | 2010-12-28 | 2012-07-11 | 湖南晟通科技集团有限公司 | Annealing process for aluminum foil |
| CN104561671A (en) * | 2014-12-29 | 2015-04-29 | 镇江鼎胜铝业股份有限公司 | Method for preparing high-elongation medical aluminum foil from cast rolled stock |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04231442A (en) * | 1990-12-27 | 1992-08-20 | Furukawa Alum Co Ltd | Production of aluminum foil for middle-and high-voltage electrolytic condenser anode |
| CN1111681A (en) * | 1995-03-30 | 1995-11-15 | 云南铝加工厂 | Technology of sectional type negative pressure anneal oil removing for aluminium material |
| JPH0920970A (en) * | 1995-06-30 | 1997-01-21 | Kobe Steel Ltd | Method for annealing aluminum foil for electrode of electrolytic capacitor |
| CN102560294A (en) * | 2010-12-28 | 2012-07-11 | 湖南晟通科技集团有限公司 | Annealing process for aluminum foil |
| CN104561671A (en) * | 2014-12-29 | 2015-04-29 | 镇江鼎胜铝业股份有限公司 | Method for preparing high-elongation medical aluminum foil from cast rolled stock |
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